[PATCH] nvme: duplicate NQNs check if devices needed

[luanshi]

Hi Keith,

在 2021/11/30 0:34, Keith Busch 写道:
> On Mon, Nov 29, 2021 at 07:18:54PM +0800, Liguang Zhang wrote:
>> @@ -2587,6 +2587,9 @@ static struct nvme_subsystem *__nvme_find_get_subsystem(const char *subsysnqn)
>>   
>>   	lockdep_assert_held(&nvme_subsystems_lock);
>>   
>> +	if (strncmp(subsysnqn, "nqn.", 4))
>> +		return NULL;
> This seems like an arbitrary way to decide not to check for duplicates.
> Shouldn't we just add the NVME_QUIRK_IGNORE_DEV_SUBNQN quirk for the
> broken controllers?

Yeah, add the NVME_QUIRK_IGNORE_DEV_SUBNQN quirk is a way to resolve the 
problem. I do not

have enough controller in my hand, I don't make sure all the controller 
are covered. And there are some

Weird devices from partners are not registered in pci id table:

https://pci-ids.ucw.cz/

"nqn." prefix is a required naming, so i used this way.


Thanks,

Liguang